Catena is a legendary name in Argentinian Malbec.
A recent episode of "In Business" with the BBC's Peter Day told some of the story of the family and their influence on the industry.
This "Zapata" Catena 2009 is a superb example. You can read about the family here: http://en.m.wikipedia.org/wiki/Bodega_Catena_Zapata
It's a fascinating story.
This 2009 is smooth, full bodied and has the length that many Malbecs I've had recently have lacked.
Well worth £10-15.